Online Koplopers is now known as Endeavour


The gap between supply and demand of online marketers and developers was the start of Online Koplopers, which is now called Endeavour Heroes.

What happens if you are an HR employee who wants to make the switch to digital marketing and you search for a job in Haarlem via Google? Then you end up pretty quickly with online marketing agency DBOM. Which was exactly what Martijn van Royen, founder of Online Koplopers, did in 2015. 

He started there as a junior marketer, but with his eagerness to learn he quickly worked his way up to operational manager. Not long after, one of DBOM’s clients came to Martijn asking if they didn’t ‘have another marketer to spare’. They did not, but on the other hand, almost every day eager young marketers applied for jobs for which there was no room. This gap between supply and demand stuck with Martijn and turned out to be the start of a smart and successful spin-off of DBOM that became known as ‘Online Koplopers’. 

Together with Endeavour Group

At the time Online Koplopers started operating as an individual company, it was already part of the Endeavour Group. However, within that group, the concept proved a very welcome addition to the existing portfolio. It closed the last open gap in the market that Endeavour wanted to fill. Eventually, the role of Online Koplopers, which initially focused solely on training and introducing young online marketers to the market, was expanded to include a branch for would-be developers. From then on, the project continued as Endeavour Heroes.

Endeavour Heroes

Martijn is still happy with the success of the spontaneously generated concept. “I recently heard that one of the guys who started as a Koploper now has his own successful agency. However, there are also ‘our people’ walking around at Dopper and even Heineken. It is truly an honour to be able to guide young people in their development. Not only with knowledge in their field, but also in their role as a professional on the labour market. They have the talent, we are the springboard. My ultimate wish is that in ten years’ time there will be people who can say: ‘Looking back, I see Endeavour Heroes as the ideal first step of my career’. The name Heroes better suits what we do and the cooperation with the other specialists within Endeavour contributes every day to the opportunities we can offer these young heroes.”

Explore our other pillars

You may ask us anything

Or just stop by to say hi. We are thrilled to think about your challenges.

Contact us
Jeroen Rutte contact
+31 (0)23 727 1077 09:00 - 17:00
Gonnetstraat 32 2011 KA Haarlem

Let us contact you

We build


We build websites, apps or e-commerce platforms designed to trigger your target audience, represent your brand and achieve your goals.
We create


Content is the translation of your brand into images and text. Stay in touch with your target audience through video, copy, social media and influencers.
We spark


Create a plan for measurable growth and find out what you actually earn from your marketing efforts like ads, data, email and so much more.
We provide


Get your team supported by the new generation of marketers, who match your organisation and challenge you with fresh eyes and their personal expertises and skills.

We shape 

Digital Strategy

Achieve goals by positioning your brand smartly.
This field is for validation purposes and should be left unchanged.